18th February 2024

A 34-year-old female presents with dysuria and increased urinary frequency

A 34-year-old female presents with dysuria and increased urinary frequency and was prescribed trimethoprim for her UTI. After taking her antibiotics, she began to develop a widespread urticarial rash and facial swelling. She developed difficulty breathing with associated stridor. Her oxygen saturation was maintained with a normal heart rate and BP. She remains able to speak in complete sentences.

Which of the following treatments should be administered FIRST?

Select the SINGLE most appropriate option from the list below. Select ONE option only.